Give the detailed function of mitochondria?

Answer 1

http://encarta.msn.com/encyclopedia_761582165/mitochondria.html

That gives a very detailed answer of what you are looking for.

Answer 2

Mitochondria are known as the powerhouses of the cell because they generate energy in the form of ATP through the process of cellular respiration. They also play a role in regulating cell metabolism, controlling cell growth and death, and are involved in signaling pathways that affect cellular processes. Mitochondria are essential for various cellular functions and are particularly important in tissues with high energy demands, such as muscle and nerve cells.